TruFuel incorporates a fuel preservative that keeps the product fresh for over 2 years. Because it has no ethanol, it won't harm plastic and is excellent for long term storage. TF3 performance package has a powerful detergent that prevents deposits and cleans fuel system, has a friction modifier that lubricates engine parts and improves fuel economy, and a stabilizer to prevent corrosion and extend shelf life. Ready-to-use and is perfect for small engine outdoor power equipment such as string trimmers, blowers, and chain saws. Great for all 4-cycle equipment and engineered specifically for small engines. Premium fuel (92 octane).